uniq(1) [ultrix man page]

uniq(1) 						      General Commands Manual							   uniq(1)

Name
       uniq - report repeated lines in a file

Syntax
       uniq [-udc[+n][-n]] [input[output]]

Description
       The  command  reads  the  input	file comparing adjacent lines.	In the normal case, the second and succeeding copies of repeated lines are
       removed; the remainder is written on the output file.  Note that repeated lines must be adjacent in order to be found.  For further  infor-
       mation, see

Options
       The n arguments specify skipping an initial portion of each line in the comparison:

       -n Skips specified number of fields.  A field is defined as a string of non-space, non-tab characters separated by tabs and spaces from its
	  neighbors.

       +n Skips specified number of characters in addition to fields.  Fields are skipped before characters.

       -c Displays number of repetitions, if any, for each line.

       -d Displays only lines that were repeated.

       -u Displays only unique (nonrepeated) lines.

       If the -u flag is used, just the lines that are not repeated in the original file are output.  The -d option specifies  that  one  copy	of
       just the repeated lines is to be written.  The normal mode output is the union of the -u and -d mode outputs.

       The  -c option supersedes -u and -d and generates an output report in default style but with each line preceded by a count of the number of
       times it occurred.

See Also
       comm(1), sort(1)

																	   uniq(1)

uniq(1) 							   User Commands							   uniq(1)

NAME

       uniq - report or filter out repeated lines in a file

SYNOPSIS

       uniq [-c | -d | -u]  [-f fields] [-s char] [ input_file [output_file]]

       uniq [-c | -d | -u]  [-n] [ + m] [ input_file  [output_file]]

DESCRIPTION

       The uniq utility will read an input file comparing adjacent lines, and write one copy of each input line on the output. The second and suc-
       ceeding copies of repeated adjacent input lines will not be written.

       Repeated lines in the input will not be detected if they are not adjacent.

OPTIONS

       The following options are supported:

       -c	       Precedes each output line with a count of the number of times the line occurred in the input.

       -d	       Suppresses the writing of lines that are not repeated in the input.

       -f fields       Ignores the first fields fields on each input line when doing comparisons, where fields is a positive  decimal  integer.  A
		       field is the maximal string matched by the basic regular expression:

		       [[:blank:]]*[^[:blank:]]*

		       If fields specifies more fields than appear on an input line, a null string will be used for comparison.

       -s chars        Ignores	the first chars characters when doing comparisons, where chars is a positive decimal integer. If specified in con-
		       junction with the -f option, the first chars characters after the first fields fields will be ignored. If  chars  specifies
		       more characters than remain on an input line, a null string will be used for comparison.

       -u	       Suppresses the writing of lines that are repeated in the input.

       -n	       Equivalent to -f fields with fields set to n.

       +m	       Equivalent to -s chars with chars set to m.

OPERANDS

       The following operands are supported:

       input_file      A path name of the input file. If input_file is not specified, or if the input_file is -, the standard input will be used.

       output_file     A path name of the output file. If output_file is not specified, the standard output will be used. The results are unspeci-
		       fied if the file named by output_file is the file named by input_file.

EXAMPLES

       Example 1: Using the uniq command

       The following example lists the contents of the uniq.test file and outputs a copy of the repeated lines.

       example% cat uniq.test
       This is a test.
       This is a test.
       TEST.
       Computer.
       TEST.
       TEST.
       Software.

       example% uniq -d uniq.test
       This is a test.
       TEST.
       example%

       The next example outputs just those lines that are not repeated in the uniq.test file.

       example% uniq -u uniq.test
       TEST.
       Computer.
       Software.
       example%

       The last example outputs a report with each line preceded by a count of the number of times each line occurred in the file:

       example% uniq -c uniq.test
	  2 This is a test.
	  1 TEST.
	  1 Computer.
	  2 TEST.
	  1 Software.
       example%

ENVIRONMENT VARIABLES

       See environ(5) for descriptions of the following environment variables that affect the execution of uniq: LANG, LC_ALL,	LC_CTYPE,  LC_MES-
       SAGES, and NLSPATH.

EXIT STATUS

       The following exit values are returned:

       0	Successful completion.

       >0	An error occurred.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWesu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       comm(1), pack(1), pcat(1), sort(1), uncompress(1), attributes(5), environ(5), standards(5)

SunOS 5.10							    20 Dec 1996 							   uniq(1)